Several factors affecting the cutting quality of t

2022-09-23
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Several factors affecting the cutting quality of paper

the main machine factors affecting the cutting quality of paper

the cutting size of paper does not meet the requirements, the cutting is skewed, the incision has knife marks and has the phenomenon of continuous knife, the paper stack is long up and short down after cutting, and other problems are common cutting quality problems, except for unskilled technical operation, uneven paper collision, paper deformation, inaccurate relative position between the paper stack and the paper pusher, and uneven paper wrinkles, Other main influencing factors are as follows:

1. Improper adjustment of the cutting knife and blade

will cause the cutting knife to fall not in place, resulting in the phenomenon of knife connection; The falling height of the cutting knife is too low, which makes the knife mark of the knife bar too deep, forming a rough cut or a broken knife bar. The normal depth of the cutting knife cutting into the knife bar is 0.5 ~ 1mm; Technical parameters of blunt blade and Uneven Blade: it is also easy to have even knives or rough cuts

2. Factors in the paper cutter

(1) the reference line for cutting paper size on the paper pusher is the rear stop gauge, which should be parallel to the cutting line and perpendicular to the workbench

(2) when the cutter falls, the cutter should be perpendicular to the workbench, and the blade of the cutter should be parallel to the workbench and adjusted to a certain height

(3) the paper presser should be able to adjust the pressure and maintain its stability according to the cutting requirements. Generally, the gauge pressure should be within the range of 4 ~ 10MPa, and it is not allowed to exceed 15MPa, which is the premise to ensure the cutting quality

when PP decorative parts are assembled or subjected to external forces such as twists and turns, impact, etc.

therefore, when installing and debugging the paper cutter, the above parts should be accurately adjusted, otherwise the cutting specification will not meet the requirements or the cutting will be skewed

3. there is a small notch on the blade, and there is a knife scratch on the edge of the cutting object

due to the diversity of the sources of HTML documents

4. The reason for the paper stack to be long up and short down after cutting

(1) the blade of the cutting knife is too blunt, which is easy to pull out the surface layer of the cutting object and make the specifications inconsistent

(2) the cutter is not perpendicular to the workbench

(3) the front surface of the paper pusher is not perpendicular to the surface of the workbench, the paper pusher tilts forward, and the paper stack after cutting is long at the top and short at the bottom; The paper pusher tilts back, and the cut paper is folded up short and down long

(4) the higher the stack, the higher the pressure of the press, the greater the anti cutting knife of the stack, thus increasing the bending deformation of the stack, and the phenomenon of long top and short bottom of the cut stack appears. Therefore, the height of the paper stack should be controlled below 100mm, and the corresponding cutting height should also be adjusted appropriately due to the different thickness of the paper

(5) the pressure of the paper press should depend on the nature of the paper being cut. The specification, size and quantity change. In order to achieve accurate cutting, such as the change of temperature, product size, humidity, etc., the paper must be compressed with a paper press. When cutting ordinary paper, the pressure of the paper press should be higher; When cutting hard paper or paperboard, the pressure of the paper press should be smaller

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